Chins works



F 3, 1931. E. HARTLEY DOLL ROLL TWISTER STOP MOTION Filed Nov. 11. 1929 INVENTOR. (22a KTTORNEYS.

Patented Feb. 3, 1931 UNITED STATE-stars ELLIs HARTLEY, or WHITINSVILLE, MAs'sAorIusnrrs, Assreivoitro'wnrrnvllvre- CHINE WORKS, 031 CHUSETTS DOLL-ROLL rwrsrna stror Mormon Application filed November 11, 1929; ,SeriaI No.406, 2 74.

This invention relates to improvements in a stop motion for a twister of theso-called doll roll type. In such twisters the more usual horizontal feed rolls are replaced by i single doll rolls, rotatableon vertical axes and around which the yarn is fed in a helical path. 1 V r It is the object of my invention to provide improved meansfor stopping any one of the doll rolls upon breakage of theyarn fed therefrom, and to providemeans for pre-" venting rebound of the doll roll when the rotation thereof is thus stopped.

7 My invention further relatesto arrange ments and combinationsof parts which will be hereinafter described and more particu-" V larly pointed out in the appended claims.

' ber 28.

A preferred form of the invention is shown in the drawings in which 7 F ig. l is apartial sectional side elevation of parts of a twister embodying my improvements; 2

Fig. 2 is an enlarged sectional side eleva tion of the doll roll and stopping mechanism; Fig. 3 is a side elevation of a portion of the driving mechanism, looking in the direction of the arrow 3 in Fig.2, and

Fig. 4 is a sectional plan View of certain parts, looking in the direction of the arrow 4 in Fig. 2. V g

Referring to the drawings, I have shown aportion of a twister frame having the usual spindles S mounted on a spindle rail 12 and supporting spools or bobbins B, ro-

tatable in rings 13 mounted on a ring rail 14. Yarn spools are looselymountedlon creel rods 22 and supply y'arnstrands Y'from which the thread T is twisted.

A doll roll 25 is provided for each spindle S and each doll roll is mounted on a fixed stud 27 (Fig. 2) secured a frame mem- A driving member 30vis loosely mounted on each stud 27 and has a worm and worm wheel or spiral gear connection with a'driving shaft 32, by which all of the-members 3Ov are continuously rotated. "A plate 34 is loosely mounted on each stud 27 and above the driving member 30 and supports a pawl 35, pivoted at 36 on said plate and having a 'nection with the plate 34.

hook-shaped portion adapted to be engaged wrII'rINsvrLLE, MASSACHUSETTS, A ooarone'r'ron or MASSA -j by a driving arm 38 onthe drivingfmem- The doll roll 25 has a 'depending SlGeFQ'Ol' hub portion 4'0, provided with a} projecting lug-4L1 adapted to be received in'a slot in'the upper portion of the driving plate-'34. The

doll 'roll thus has a detachable driving con- The yarnstrands Y pass from the spools roll 25, through a {second guidefeye 51, under ajgu'ide' rod 52; and through an eye 53"inthe .end ofea' two-piece stopping lever 55.- The thread T then passes under a traveler' 56 onthe ring 13 andtlience to the bobbin B.

61 secured to across framemember, and the withfa forked end having offset lugs 62 Fig;

'- The lever 55; is pivoted at "on'a bracket 7 rear or inner end of the lever 55 is provided 4;) which maybe positioned for engagement thepawl 35 as the plate 34is rotated.

During normal operation, the ,lever- 55. is held in the'position indicated in F ig. 1, with with the upwardly extending end portionfof its outer 'portionfresting on a stop'lug 63, the

- lever being held in this position by the downward pull of the thread T. If the thread T is broken, the forked inner portion of the. lever 55 over-balances. the outer portion and the lever moves to the position indicated in Fig. 2." with thelugs 62 in'the path of the pawl 35. I Further rotation of the plate 34 causes the Y the other of thelugs 62 and to be .raised to theinoperative position indicated in Fig. 2,

pawl 35 to be engaged by one or $51- thus stopping the rotation 'of the dollroll 25."

It has been found in high speed operation that this abrupt stoppingv of thedoll roll frequently causes a rebound thereof suflicient V on the upper surface of the plate 34, so po sitioned that it will engage onefface of the oflset lug 62 whenever the doll roll'is stopped ver.

2. .111 Pa twister; a doll roll, driving means therefor including -a driving clutchgpawl, a plate rotatable with said doll by engagement of the opposite face of the lug 62 with the pawl 35.

Such engagement of the lug 70 with the lug 62 prevents reverse motion or rebound of the doll roll, and consequently prevents re-engagement *of the pawl 35 and, consequent breakage thereof.

Atwister equipped with the stop motion herein described iscapable of high-speed U operation and anyindividual doll roll'j'may be effectively brought to rest uponfthrea'd breakage and will be thereafter held from reverse rotation.

Having thus described my invention and the advantages thereof, I do not wish to be limited to "the details =herein disclosed but -what lelaim is :i s 1. In a twister, a doll roll, drivingmeans therefor :including a driving arm and a clutch pawl, a 'yarnbont-rolled lever effective on yarn breakage to disengage said olutch pawl from said driving :arm, and -means to .prevent rebound ofsaid dollroll when'forward rotation thereof is-stopped' by said leroll and .on which said pawl-isfipivotally mountecLa yarn-controlled lever e QCtiVG OII 'yarn breakageytoaengage said pawl andto .--disoonnect said :pawl from said driving arm,

anda lug or said-plate positionedto thereupon engage said lever and therebynprevent said lever.

rebound of said doll rolbwhen stopped by -In.t estimony whereof I have hereunto affixed signature. V

.ELL-rs HARTLEY. 

